MAILET-100 To replace a header, AddSubjectPrefix is supposed to remov…

…e previous value
apache · Sep 5, 2016 · 27fb35d · 27fb35d
1 parent 1081d8f
commit 27fb35d
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/mailet/standard/src/main/java/org/apache/james/transport/mailets/AddSubjectPrefix.java b/mailet/standard/src/main/java/org/apache/james/transport/mailets/AddSubjectPrefix.java
@@ -57,6 +57,11 @@ public void init() throws MessagingException {
     public void service(Mail mail) throws MessagingException {
         MimeMessage m = mail.getMessage();
         String newSubject = prefixSubject(m);
+        replaceSubject(m, newSubject);
+    }
+
+    private void replaceSubject(MimeMessage m, String newSubject) throws MessagingException {
+        m.setSubject(null);
         m.setSubject(newSubject, Charsets.UTF_8.displayName());
     }